Mary was born about 1860 to David Fairbairn and Charity Walker. She passed away about 1930. 
Hawkesbury, Prescott, Ontario, Canada
FAIRBAIRN: David, 39, carpenter (Ross said farmer), Charity 35; Children: Agnes 14; Jane 12; Mary 10; Devizes, 8; Ann, 6; David 2 all b CW (i.e. Canada West, now Ontario). 
Menominee, Michigan, USA
WILLMAN: Samuel 59 ..man, Lumber, b Jul 1840 CAN F b SCT M b ENG marr 32 yrs, emig 1860; wife Mary48 b Jun 1851 CAN F b ENG M b IRE, emig 1860 13 children 9 living; Children: Catarina 14 b Mar 1886 b WI; Grace 11 b Jul 1888 WI; Kenneth 5 b Aug 1894 MI all F/M b CAN; (on same page as brother (-in-law) John WILLMAN and mother-in-law Charity) 
↑ Information as research / entered by Steven Trail, Wednesday, April 23, 2014.
↑ 1861 Census images for Canada: Hawkesbury, Ontario, hsehold of David & Charity FAIRBAIRN
↑ 1900 Census, Menominee, MI, hsehold of Samuel and Mary WILLMAN, from Census images via Ancestry.com
It may be possible to confirm family relationships with Mary by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Mary: